Kinds are now full classified name
Improve operation on quantities

Signed-off-by: Clement Escoffier <clement.escoffier@gmail.com>
Added tests

Signed-off-by: Clement Escoffier <clement.escoffier@gmail.com>
Explicit configuration of the quantity's kind

Signed-off-by: Clement Escoffier <clement.escoffier@gmail.com>
Add quantities comparison

Signed-off-by: Clement Escoffier <clement.escoffier@gmail.com>